Dental plate.



J. PETRY.

DENTAL PLATE.

APPLICATION FILED mm: 11, 1910.

Patented Apr. 18, 1911.

FIG. 1 FIG. 2

4 III." III".

WITNESSES.

. W K mvwa.

PATENT OFFICE JACOB PETRY, F PITTSBUBG, PENNSYLVANIA.

DENTAL PLATE.

Specification of Letters Patent.

Application filed June 11, 1910. Serial No. 566,362.

To all whom it may concern:

Be it known that I, Jason Pn'rar, a resident of Pittsburg, in the county of Alleqheny and State of Pennsylvania, have inended a new and useful Improvement in Dental Plates; and I do hereby declare the following to be a full, clear, and exact description thereof;

My invention relf'ttes to dental-plates and more especially to the manner of securing the suction-plate therein.

The object of my invention is to provide for the securing of the suctimrplate in the dental-plate so that the same will be held securely therein with its outer'cdges held down beneath the over-hanging; portions of the dental-plate formed by the depression to receive the suction-plate.

To these ends my invention consists, generally stated, in a suctioirplate having a flexible metal reinforcementaround its edges,

so that the plate may be sprung sniliciently to insert it in the underlying recess formed in the dental-plate and when once inserted therein will be expanded sufiicient-ly to pre vent its slipping therefrom.

In the accompanying drawings Figure 1 is a perspective view of my invention; Fig. 2 is a like view showing the suction-plate removed; Fig. 3 is a plan view of the suction plate; Fig. 4 is a section on the line 4-4 Fig. 1; Fig. 5 isa view of the resilient reinforcement removed; and Fig. 6 is an :cnlarged sectional view of the portion of the suction-plate showing the resilient reinforcement therein.

In the drawings the numeral 2 designates the dental-plate formed of vulcanized rubber in the ordinary manner and provided with the depression 3 which has the underlying recess or groove 4 formed by the overhanging portions 5 of theplate. The suctionpla.tc 6 is ma do of a flexible rubber with its suction-cups 6 integral therewith in ac cordance with a patentgranted to me on the 5th day of July, 1910, No. 963.172.

The outer edge of the suction-plate 6 has the resilient reinforcement 01' wire 7 embedded therein, and this may be accomplished by turning the outer edge of the suction-plate over to surround the wire 7 and then vulcanizing the rubber at the edge so as to completely embed the wire 7 thereslipping therefrom. To further insure the ,retention of the suction-plate, I prefer, however, to cement the suction-plate to the dental-plate.

The edges of the suction-plate are thus held down within the recess 4 of the dentalplate and there is no liability of the edges of the suction-plate slipping out or working loose. The wire reinforcement 7 will hold .the edges of the suction-platesnugly in the recess 4, but if it is desired to remove the same for any reason by inserting the pointed instrument underneath the over-hanging portion 5 of the dental plate theedges of the suction-plate may be released and the suction-plate withdrawn. The reinforcement wire when once embedded in the suctiom plate will not be exposed in any way to moisture and there is no danger of difiiculty from corrosion of the metal.

What I claim is:

1. A dental-plate having a depression and a recess formed by the overhanging portions of said plate surrounding said depression, a suction-plate. and a resilient metal reinforcement around the edge of said suction plate and fitting in such recessed portion of said dental-plate.

2. A dental-plate having a depression and a recess formed by the overhanging portions of said plate surrmnuling said depression, a suction-plate, and a wire embedded in the outer-edgeof the suctionplate adapted to engage the recessed portion of Sflld dental-plate.

In testimony whereof, I the said Jacon Pn'rar have hereunto set my hand.

Ronna'r C. TO'I'IEN, JOHN F. lVILL.

Patented Apr. 18, 1911. 

